PLATE XXII
1. Haliomma, showing traces of the Sarcode.
2. Haliomma, with strong thorny spines.
3. Eucyrtidium, with shell much thickened.
4. The inside portion of Ehrenberg's Stephanastrum Rhombus, with the investing web, and the edge or border , broken away, or become obsolete. Many examples of this in Mr. Mansfield Browne's Barbados slides.
5. & 6. Varieties of Rhabdolithes Sceptrum of Ehrenberg.
7. Probably an arm of a Stephanastrum.
8. An elongated variety of Eucyrtidium Tubulous, or Eucyrtidium Elegans of Ehrenberg.
